M 4

One of the nearest globular clusters, M4 can be detected by the naked eye under very dark skies (1.3 degrees west of Antares).

In 1987, the first millisecond pulsar was discovered in this globular cluster.

In August 1995, the Hubble Space Telescope has photographed white dwarf stars in M4, which are among the oldest stars in our Milky Way Galaxy.

Bill Arnett's Antares & Rho Ophiuchi nebula pages include M4: photo page, info page.

Right ascension	16 : 20.6 (hours : minutes)
Declination	-26 : 24 (degrees : minutes)
Distance	10.0 (light-years*10^3)
Visual magnitude	6.4